"The thing that drives me bonkers at work is to open up the trash can drawer and see a cup half-full of water that was carefully placed into the trash can so it doesn't spill--in a trash can an arm's length away from the kitchen sink!

99% of the people in my office are college graduates, probably toward the top of their class. But some without enough common sense to pour the water in the sink before putting the cup into the trash can.